LocalWiki

LocalWiki is an open content and open source software project that allows communities to share local knowledge (HyperLocal) on the web in the form of city wikis. The LocalWiki project was founded by Davis Wiki creators Mike Ivanov and Philip Neustrom[1] and is a project of Wiki Spot, a 501(c)(3) nonprofit community improvement organization[2] based in San Francisco, California... LocalWiki is built on the Django framework in Python.

http://en.wikipedia.org/wiki/LocalWiki

Open Source WikiEngine code https://github.com/localwiki/localwiki/